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https://hdl.handle.net/2440/131036
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Type: | Journal article |
Title: | Diagnostic yield of whole genome sequencing after non-diagnostic exome sequencing or gene panel in developmental and epileptic encephalopathies |
Author: | Palmer, E.E. Sachdev, R. Macintosh, R. Genetic Counselling, G.D. Melo, U.S. Mundlos, S. Righetti, S. Kandula, T. Minoche, A.E. Puttick, C. Gayevskiy, V. Hesson, L. Idrisoglu, S. Shoubridge, C. Thai, M.H.N. Davis, R.L. Drew, A.P. Sampaio, H. Andrews, P.I. Lawson, J. et al. |
Citation: | Neurology, 2021; 96(13):e1770-e1782 |
Publisher: | American Academy of Neurology |
Issue Date: | 2021 |
ISSN: | 0028-3878 1526-632X |
Statement of Responsibility: | Elizabeth Emma Palmer, Rani Sachdev, Rebecca Macintosh, Uirá Souto Melo, Stefan Mundlos, Sarah Righetti ... et al. |
Abstract: | OBJECTIVE: To assess the benefits and limitations of whole genome sequencing (WGS) compared to exome sequencing (ES) or multigene panel (MGP) in the molecular diagnosis of developmental and epileptic encephalopathies (DEE). METHODS: We performed WGS of 30 comprehensively phenotyped DEE patient trios that were undiagnosed after first-tier testing, including chromosomal microarray (CMA), and either research ES (n=15) or diagnostic MGP (n=15). RESULTS: 8 diagnoses were made in the 15 individuals who received prior ES (53%): 3 individuals had complex structural variants; 5 had ES-detectable variants which now had additional evidence for pathogenicity. 11 diagnoses were made in the 15 MGP-negative individuals (68%); the majority (n=10) involved genes not included in the panel, particularly in individuals with post-neonatal onset of seizures and those with more complex presentations including movement disorders, dysmorphic features and/or multi-organ involvement. 42% of diagnoses were autosomal recessive or X-chromosome linked. CONCLUSION: WGS was able to improve diagnostic yield over ES primarily through the detection of complex structural variants (n=3). The higher diagnostic yield was otherwise better attributed to the power of re-analysis rather than inherent advantages of the WGS platform. Additional research is required to assist in the assessment of pathogenicity of novel non-coding and complex structural variants and further improve diagnostic yield for patients with DEE and other neurogenetic disorders. |
Keywords: | Chromosomes, Human, X Humans Spasms, Infantile Nerve Tissue Proteins Child, Preschool Infant Female Male Chromosome Inversion Pathology, Molecular Rho Guanine Nucleotide Exchange Factors MEF2 Transcription Factors Whole Genome Sequencing Exome Sequencing |
Description: | First published February 10, 2021 |
Rights: | © 2021 American Academy of Neurology. |
DOI: | 10.1212/WNL.0000000000011655 |
Grant ID: | http://purl.org/au-research/grants/nhmrc/11149630 |
Published version: | http://dx.doi.org/10.1212/wnl.0000000000011655 |
Appears in Collections: | Aurora harvest 4 Medicine publications |
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